Question

☞ Topic :- Echocardiography.

So, From above topic.

Explain how they works : -
▪ P- Wave.
▪ QRS wave.
▪ T - wave.

Answer 1

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$\underline{ANSWER}$ ➡

$<b><i>P - wave ➡ P - wave is Primary Wave. This is the fastest kind of seismic wave.Consequently the first to 'arrive' at a seismic station.A P-wave is one of the two main types of elastic body waves, called seismic waves in seismology.This happens right before the atria contract and push blood into the ventricles.$

QRS - wave ➡ The QRS complex is 80 to 120 ms in duration. This is represented by three small squares or less at the standard paper speed of 25 mm/s.This wave is much larger than the P wave, and it represents the depolarization of the ventricles.

T - wave ➡ The T wave represents the repolarization of the ventricles in electrocardiography.T wave is referred to as the absolute refractory period. Duringventricle contraction (QRS complex), the heart depolarizes.

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Answer 2

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» $\textbf{Echocardiography}$ is a test which uses sound waves to produce images of heart.
 

» P - wave :-

• These are primary waves.

• Atrial depolarization.

• Action potential moving throughout the atria; intiates atrial contraction.


» QRS complex :-

• Represent ventricular deplarization.

• These waves are greater than P - waves.

• Action potential spreads throughout the ventricles.

• Intiates ventricular contraction.


» T - waves :-

• Represent ventricular repolarization.

• These waves occurs before ventricle relaxation.

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